Chemical Process Calculation Questions and Answers – Energy Balances – Terminology – IV

This set of tough Chemical Process Calculation Questions focuses on “Energy Balance terminology – IV”.

1. A ___________ is any variable whose value depends on how the process takes place.
a) Path variable
b) State variable
c) Neither Path nor State variable
d) None of the mentioned
View Answer

Answer: a
Explanation: A Path variable is any variable whose value depends on how the process takes place.

2. Which one is not a path variable?
a) Work
b) Heat
c) Internal Energy
d) None of the mentioned
View Answer

Answer: c
Explanation: Internal energy does not depend on the path.

3. Any variable whose value depends only on the state of the system is called
a) Path variable
b) State variable
c) Neither Path nor State variable
d) None of the mentioned
View Answer

Answer: b
Explanation: A State variable is any variable whose value depends only on the state, not on the previous history.
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4. Which one is a state variable ?
a) Internal Energy
b) Enthalpy
c) Entropy
d) All of the mentioned
View Answer

Answer: d
Explanation: All a, b, c are state variables as these are only depended only on the state, not on the history.

5. For an adiabatic system, two statements are given as following
I: The system is insulated
II: The process takes place so fast that there is no time for heat to be transferred.
a) Only I is correct
b) Only II is correct
c) Both I & II are correct
d) Neither I nor II correct
View Answer

Answer: c
Explanation: Both I and II are the properties of an Adiabatic system.
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6. Which one is an intensive variable?
a) Pressure
b) Temperature
c) Volume
d) All of the mentioned
View Answer

Answer: d
Explanation: All three Pressure, Temperature and Volume are intensive variables as these are not depended on the path .

7. Heat transfer is caused by
a) Pressure difference
b) Temperature difference
c) Volume difference
d) None of the mentioned
View Answer

Answer: b
Explanation: Heat transfer is caused by Temperature difference.
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8. Heat is ___________ when transferred to a system.
a) Positive
b) Negative
c) Zero
d) None of the mentioned
View Answer

Answer: a
Explanation: Heat is Positive when transferred to a system.

9. Heat is negative when transferred to the _____________
a) System
b) Surrounding
c) Boundary
d) None of the mentioned
View Answer

Answer: a
Explanation: Heat is negative when transferred to the surrounding .
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10. A process in which no heat transfer takes place (Q=0) is
a) Isobaric process
b) Adiabatic process
c) Isothermal process
d) None of the mentioned
View Answer

Answer: b
Explanation: A process in which no heat transfer takes place (Q=0) is an Adiabatic process.

Sanfoundry Global Education & Learning Series – Chemical Process Calculation.
To practice tough questions on all areas of Chemical Process Calculation, here is complete set of 1000+ Multiple Choice Questions and Answers.

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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